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3 years ago

Which statement about the fossil record is correct?

Chemistry

2 answers:

antoniya [11.8K]3 years ago

6 0

Answer: most specimen that have lived on earth is still living here on earth

Explanation:

lubasha [3.4K]3 years ago

5 0

The answers is the last answer choice!!

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Sound waves are mechanical waves in which the particles in the medium vibrate in a direction parallel to the direction of energy

Viefleur [7K]

Answer b longitudinal waves

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4 years ago

Suggest a reason why gold is expensive, even though it is found native in rock.

Delvig [45]

Because it’s rare to find, and has a Extraordinary color that most rocks don’t have. Please mark as brainliest

6 0

3 years ago

The rate of a hypothetical reaction involving L and M is found to double when the concentration of L is doubled and to increase

Semmy [17]

Answer: $Rate=k[L]^1[M]^2$

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

$L+M\rightarrow products$

$Rate=k[L]^x[M]^y$ (1)

k= rate constant

x = order with respect to L

y = order with respect to M

n =( x+y)= Total order

a) If [L] is doubled, the reaction rate will increase by a factor of 2:

$2\times Rate=k[2L]^x[M]^y$ (2)

b) If [M] is doubled, the reaction rate will increase by a factor of 4:

$4\times Rate=k[L]^x[2M]^y$ (3)

Dividing 2 by 1:

$\frac{2\times Rate}{Rate}=\frac{k[2L]^x[M]^y}{k[L]^x[M]^y}$

$2=2^x$

$x=1$

Dividing 3 by 1

$\frac{4\times Rate}{Rate}=\frac{k[L]^x[2M]^y}{k[L]^x[M]^y}$

$4=2^y$

$2^2=2^y$

$y=2$

Thus rate law is: $k[L]^1[M]^2$

4 0

4 years ago

54 Identify the type of bonding in solid potassium.

Vadim26 [7]

Base on the question and in my further research and investigation about the said problem that states to identify the type of bonding in solid potassium, I would say that the bondings are metallic bonding and metallic. I hope you are satisfied with my answer and feel free to ask for more

4 0

3 years ago

I smell onions.

goldenfox [79]

Answer:

Observation

-I smell onions

-My dog weighs 45 pounds

-It is 85 degrees outside today

Predictions

-My dog will bark at the vacuum cleaner

although he has never seen it before

-My mother is going to cook spaghetti for

supper next Tuesday

-It will be a long, hot summer

Explanation:

5 0

3 years ago

Read 2 more answers